Electrical switching device.



M. H. SPI'ELMAN. ELECTRICAL SWITCIHNGI DEVICE.

Patented Dec. 12,1916.

APPLICATION FILED DEC lll i914.

MAXIMILLIAN H. SPIELMN, OF NEWl YORK, N. Y.

ELECTRICAL SWITCHING DEVICE.

Specification of Letters Patent.

Patented Dec. 12, 1916.

Application led December 11, 1914. Serial No. 876,627.

To all whom z't may concern:

Be it known that I, MAXIMILLIAN lI-I.` SPIELMAN, a citizen of the United States, and a resident of the borough of Manhattan, city, county, and State of New York, have invented certain new and useful Improvements in Electrical Switching Devices, of which the following is a description in such full, clear, and exact terms as will enable any person skilled in the art to whichit pertains to make and use the same.

The invention relates to a convenient device for switching an electrical current on and of various devices, such for example as a hand electrical lamp used by machinists. and engineers for temporary illumination.

.The object is to make the device very convenient to use with one hand only. I attain this result by certain novel features of construction which will be fully set forth hereinafter and particularly pointed out inv the claim. I

In the accompanying drawings Figure 1 is a partial section of the invention applied to an electrical hand lamp; Fig.v 2-is a side view of the same; Fig. 3 is a detached perspective view of the interior parts, some of which are shown in section; Fig. f1 is a sectional 'view of a modification; Fig. 5 is a cross section on the line 5-5 of Fig. 4 and Fig. 6 is a perspective View of a still further modification.

Referring first to Figs. 1-3, 10 is the tubular bodyof the hand lamp, 11 the reiector and 12 .the usual bulb, the plug 14 of which has two contacts 15 and a pin 16 loeking in a bayonet slot 17 in the body 10, whereby the bulb is removably held in place.

' The double wires 18 supplying the current pass into the body 10 and into an insulation plug 19 rotatable in the body. This plug has twospring pressed pins 2O respectively in electrical contact with the wires 18 and positioned to match with the contacts 15. Fastened to the plug 19 is a thumb piece '21 which passes through a slot 22 in the body 10 and projects beyond the same in convenient reach of the user. It will be seen that upon moving the thumb piece 21 from one side to another the plug 19 will be partly rotated which will move the pins 20 into orfout of connection with the contacts 15 of the bulb 12. Thereby the lamp is lighted or extinguished at will and by the simple movement of the thumb if used, with the employment of but one hand which is the same hand that holds the lamp.

In Figs. 4 and 5 the order is simply reversed, z. e.; the plug 19Il is held 'fast in the body 10u by the pin 21a and the reflector 11a is allowed to rotate, thereby turning the contacts of the bulb` on the pins of lthe plug 19L instead of turning the pins on the contacts.

The switching device is not limited in its use to the particular lamps here shown nor indeed to any lamp but may be used in various other connections where a convenient hand switching device is required. Thus in Fig. 6 it' is shown as applied to a surgical lamp. The construction and organization of the parts is the same as that before set forth and does not require any detail description. i

I do not in this application make specific claim for the Iconstruction illustrated in Figs. 4 and 5 as the same is covered in a .divisional application, led November 7th, V1916, Serial No. 129,922.

provided at an intermediate point in its length with -a transverse slot, a lamp having the base thereof tted within one end of the tubular bodyand provided on said base with 3. Contact area,- a cylindrical Ainsulating body rotatably mounted within an intermediate portion` of the tubular body, an

4cylindrical block at one side and a spring Contact plunger carried-by the signed my namein the presence of two witthereof and nesses.

MAXIMILLIA1\Iv H. SPIELMAN.

Vtnesses:

PATRICK A. BOLGER, ENDA TANNER.

directly engaging the base of the lamp'r so as to be moved into and out of engagement with the Contact area, of the lamp as the block s rotated.

-In testimony whereof I have hereunto Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of atealtsY Washington, D. C. 

